US 2006/0148643 A1 · Polyolefin production

Abstract

Provided is a catalyst component for producing a polyolefin, which catalyst component comprises a metallocene catalyst having a structure according to a formula (I): Cp1Cp2R″MQp (I) wherein Cp1 and Cp2 are each independently a cyclopentadienyl derivative which may be substituted or unsubstituted and are selected from cyclopentadienyl groups, indenyl groups and fluorenyl groups, provided that at least one of the cyclopentadienyl derivatives comprises an N atom or a P atom in it cyclopentadienyl ring; R″ is a structural bridge to impart stereorigidity between Cp1 and Cp2; and when only one of Cp1 and Cp2 comprises a P atom in its cyclopentadienyl ring, R″ is attached to that phosphorous atom, or is attached to a carbon atom in the cylopentadienyl ring distal to that phosphorous atom; and when one of Cp1 or Cp2 comprises an indenyl group and the other of Cp1 and Cp2 comprises an indolyl group, R″ is attached either directly to the N atom of the indolyl group or to a carbon atom that is vicinal to the N atom; M is a metal from Group IIIB, IVB, VB or VIB; Q is a hydrocarbyl group having from 1-20 carbon atoms, or a halogen; and p is the valence of M minus 2.

Claims26

Dependent claims

1-21. (canceled)

A olefin polymerization catalyst composition comprising a metallocene catalyst component characterized by the formula:

Cp1Cp2R″MQp
wherein:
(a) Cp1 and Cp2 are each independently a substituted or unsubstituted cyclopentadienyl derivative incorporating a cyclopentadienyl ring in the form of a substituted or unsubstituted cyclopentadienyl group, a substituted or unsubstituted indenyl group or a substituted or unsubstituted fluorenyl group wherein at least one of the cyclopentadienyl derivatives Cp1 and Cp2 incorporate a nitrogen (N) or phosphorus (P) atom in its cyclopentadienyl ring;
(b) R″ is a structural bridge between Cp1 and Cp2 imparting stereorigidity to the ligand structure provided that when Cp1 incorporates a phosphorus atom in its cyclopentadienyl ring and Cp2 is free of a phosphorus atom in its cyclopentadienyl ring, the bridge R″ is connected to the phosphorus atom in Cp1 or to a carbon atom in Cp1 which is distal to the phosphorus atom and further provided that when Cp1 is a substituted or unsubstituted indenyl group and Cp2 is a substituted or unsubstituted indolyl group, the bridge R″ is connected to the nitrogen atom of group Cp2 or to a carbon atom which is vicinal to the nitrogen atom;
(c) M is a transition metal from Group IIIB, Group IVB, Group VB or Group VIB of the Periodic Table of Elements (CAS Version);
(d) Q is a halogen or a hydrocarbyl group having from 1-20 carbon atoms;
and
(e) p is equal to the valence of the transition metal M minus 2.

5 more elements

A process for the polymerization of an ethylenically unsaturated monomer comprising:

(a) providing a metallocene catalyst component characterized by the formula:
Cp1Cp2R″MQp
wherein:
(i) Cp1 and Cp2 are each independently a substituted or unsubstituted cyclopentadienyl derivative incorporating a cyclopentadienyl ring in the form of a substituted or unsubstituted cyclopentadienyl group, a substituted or unsubstituted indenyl group or a substituted or unsubstituted fluorenyl group wherein at least one of the cyclopentadienyl derivatives Cp1 and Cp2 incorporate a nitrogen (N) or phosphorus (P) atom in its cyclopentadienyl ring;
(ii) R″ is a structural bridge between Cp1 and Cp2 imparting stereorigidity to the ligand structure provided that when Cp1 incorporates a phosphorus atom in its cyclopentadienyl ring and Cp2 is free of a phosphorus atom in its cyclopentadienyl ring, the bridge R″ is connected to the phosphorus atom in Cp1 or to a carbon atom in Cp1 which is distal to the phosphorus atom and further provided that when Cp1 is a substituted or unsubstituted indenyl group and Cp2 is a substituted or unsubstituted indolyl group, the bridge R″ is connected to the nitrogen atom of group Cp2 or to a carbon atom which is vicinal to the nitrogen atom;
(iii) M is a transition metal from Group IIIB, Group IVB, Group VB or Group VIB of the Periodic Table of Elements (CAS Version);
(iv) Q is a halogen or a hydrocarbyl group having from 1-20 carbon atoms;
and
(v) p is equal to the valence of the transition metal M minus 2;
(b) providing an activating co-catalyst component;
(c) contacting said metallocene catalyst component and said activating co-catalyst component in a polymerization reaction zone with an ethylenically unsaturated monomer to produce a polymer product by the polymerization of said monomer;
and
(d) recovering said polymer product from said reaction zone.

10 more elements

Dependencies are inferred from the claim text.

Polyolefin production

Life of this patent

Polyolefin production

Life of this patent

Abstract

Claims26